The Oxford Thesaurus An A-Z Dictionary of Synonyms INTRO ...

mainly adv. in the main, chiefly, principally, predominantly,
generally, above all, on the whole, in general, mostly, most of
all, effectively, essentially, at bottom, first and foremost,
for the most part, largely, by and large, primarily,as a rule,
usually, all in all, on balance, for all practical purposes, in
the long run: We are concerned mainly with safety. The tourists
are mainly from Italy.
mainstay n. main or chief or principal support, anchor (to windward),
sheet anchor, bulwark, buttress, linchpin, main or greatest
strength: David remains the mainstay of the sales force.
maintain v. 1 continue, preserve, persevere in, keep going, persist in,
keep (up), carry on, retain, perpetuate, prolong, sustain,
uphold: Sarah maintained friendly relations with her
ex-husband. Try to maintain your composure. 2 look after, take
care of, care for, preserve, (keep in) service, keep up, keep in
repair; nurture, support: It is expensive to maintain a vintage
car. Allison maintains an ancient aunt in Piddlington. 3 hold,
state, say, declare, claim, assert, allege, testify, contend,
aver, avow, announce, proclaim, vouchsafe, profess, insist (on),
affirm: Despite evidence to the contrary, he maintains that he
is innocent. 4 defend, stand by, keep, fight for; take up the
cudgels for, make a case for, advocate, champion, take or make a
stand for, plead for, back (up), support, vindicate, justify,
Colloq go to bat for: He maintained his ground in the face of
virulent attacks.
maintenance
n. 1 upkeep, care, preservation, conservation, support,
sustention, sustentation: I can no longer afford the
maintenance of a large country estate. 2 continuation,
continuance, perpetuation, prolongation, persistence,
maintaining: His maintenance of an untenable position will lose
him votes. 3 upkeep, livelihood, subsistence, support,
allowance, living, sustenance, stipend, subvention,
contribution, alimony, keep: How much maintenance does he pay
to his ex-wife and children?
majestic adj. 1 regal, dignified, grand, imperial, royal, noble, lordly,
lofty, elevated, exalted, glorious, magnificent, monumental,
impressive, striking, imposing, awesome, splendid, marvellous,